Custom Error Pages
Add Custom Error Pages to your Rails App
Used 30 times
A
Alemaño
Usage
Don't let error pages break your brand's flow. Create custom error pages in Rails that match your design, keeping the user experience.
For further information: https://www.dotruby.com/articles/how-to-create-a-custom-error-page-in-rails
For further information: https://www.dotruby.com/articles/how-to-create-a-custom-error-page-in-rails
Run this command in your Rails app directory in the terminal:
rails app:template LOCATION="https://railsbytes.com/script/VQLs5w"Template Source
Review the code before running this template on your machine.
run "rm public/*.html"
generate(:controller, "Errors")
create_file "app/controllers/errors_controller.rb", <<~CODE
class ErrorsController < ApplicationController
VALID_STATUS_CODES = %w[400 404 406 422 500].freeze
def show
status_code = VALID_STATUS_CODES.include?(params[:code]) ? params[:code] : 500
respond_to do |format|
format.html { render status: status_code }
format.any { head status_code }
end
end
end
CODE
create_file "app/views/errors/show.html.erb", <<~CODE
<h1><%= response.code %></h1>
<p>
<% case response.code.to_i %>
<% when 400 %>
Bad Request.
<% when 404 %>
Not Found.
<% when 406 %>
Not Acceptable.
<% when 422 %>
Unprocessable Entity.
<% when 500 %>
Internal Server Error.
<% else %>
An unexpected error occurred.
<% end %>
</p>
<%= link_to "Go back home", root_path %>
CODE
inject_into_file "config/routes.rb", after: "Rails.application.routes.draw do\n" do
<<-CODE
# Error handling routes
match "/:code",
to: "errors#show",
via: :all,
constraints: {
code: Regexp.new(
ErrorsController::VALID_STATUS_CODES.join("|")
)
}
CODE
end
inject_into_file "config/application.rb", before: /^ end\nend/ do
<<-CODE
# Use the routes to handle exceptions
config.exceptions_app = routes
CODE
end
create_file "test/controllers/errors_controller_test.rb", <<~CODE
require "test_helper"
class ErrorsControllerTest < ActionDispatch::IntegrationTest
VALID_STATUS_CODES = ErrorsController::VALID_STATUS_CODES
VALID_STATUS_CODES.each do |status_code|
test "should render \#{status_code} page" do
get "/\#{status_code}"
assert_response status_code.to_i
assert_select "h1", status_code
end
end
test "should return status code for non-html formats" do
get "/404", as: :json
assert_response :not_found
end
end
CODE